The invention provides an adhesive dispensing device. The adhesive dispensing device comprises a position fine adjustment device, a support frame, a heating cylinder, an adhesive dispensing cylinder,a lifting block, a drive mechanism and a pressurization air pipe, wherein the position fine adjustment device is connected with the support frame, the heating cylinder is detachably arranged on the lower portion of the support frame, a stop block is arranged at the top of the support frame, the pressurization air pipe penetrates through the stop block, one side, facing the heating cylinder, of thesupport frame, is provided with a guide rail along the vertical direction, the lifting block is arranged on the guide rail and can slide up and down, a through hole is formed in the heating cylinder,the adhesive dispensing cylinder is arranged in the through hole in up and down sliding mode, the upper end and the lower end of the adhesive dispensing cylinder are exposed out of the through hole,an opening is formed in the top of the adhesive dispensing cylinder, an adhesive outlet pipe is arranged at the bottom of the adhesive dispensing cylinder, and a first dummy plate and a first siliconepart are arranged in the adhesive outlet pipe. The adhesive dispensing device aims at solving the problems that an existing adhesive dispensing mode is uneven in adhesive dispensing and enables adhesive to overflow.